A U.S. executive order barred certain foreign large-power-system equipment and software; Department of Energy rules are due within 120 days.

President Donald Trump signed an emergency executive order restricting the procurement or installation of specified foreign-manufactured large-power-system equipment and associated software. The order cited national-security, cybersecurity and operational risks and covered critical equipment such as transformers.

The order authorizes the U.S. energy secretary to impose restrictions on relevant equipment that has already been installed when necessary to address identified risks. It does not apply to local distribution facilities.

The Department of Energy must issue implementing rules within 120 days. The sources do not identify the covered countries, vendors or individual products, and they do not provide replacement funding or compliance-cost estimates.